Primer retainer for dynamite cartridges.



H. COM STOCK. PRIMER RETAINER FOR DYNAMITE CARTRIDGES.

APPLICATION FILED FEB. 6. WI]- Patental Apr. 17, 1917.

oruT-ED STATES PATENT OFFICE.

HARBY COMSTOCK, 0F MINEEVILLE, NEW YORK.

PRIMER-RETAINER roa DYNAMITE cAR'rRi'noEs.

Application filed February 6, 1.917.

To all whom it may concern:

Bev it known that L'HARRY CoMs'rooK, a citizen of the United States, residing at Mineville, county of Essex, and State of New York, have invented certain new and useful Improvements in Primer-Retainers for Dynamite Cartridges, of which the following .is a specification.

This invention relates to those devices designed for retaining the primer and fuse in a dynamite cartridge to prevent accidental detachment of the fuse and primer cap or detonator from the cartridge.

Various devices have been proposed for tying or securing the fuse to the cartridge. One method'is theinsertion of the cap on the end of the fuse into an opening leading in a general lateral or inclined relation. into the dynamite within the shell-and tying the fuse to the shell. This method has the disadvantage of the fuse lying along the outside of the Icartridge and in contact with the side of the "hole; the string or cord is liable .to slip off; 'if the cap 'is longer than the diameter of the, hole, it may become lodged crosswise thereof and if the cartridge is tam ed hard in this position, it is liable to exp ode. The tendency of thetying cord to slip off renders the cap liable to pull out of the cartridge and the taniping may break the cap or cause it to explode.

Another method heretofore proposed is to unfold one end of the paper shell and to insert the cap into a hole made lengthwise of the dynamite, The opened end of the shell is then tied around the fuse by a cord. This method possesses the objection that the cap is easily pulled from the cartridge, The

paper shell of a dynamite cartridge is par afiined to render it waterproof consequently, no matter how tight the cord may be drawn, the fuse readily pulls through the neck of H paper at the end of the shell.

,-the patent to William W While this method places the primer or cap in the pro er position in the cartridge, the method 0 'anchoring is unstable and therefore unsafe.

Another plan proposed is that set forth in Jones, Number 1097442, May 19, 1914, wherein a retaining cord is inserted in the dynamite and pro- .vided with an adjustable device to engage the The cap in that construction is I-inserted from the top or end of the cartridge".v While that device satisfactorily the very great exanchors the fuseand cap,

Specification of Letters Patent.

Pat ented Apr. 1'7, 1917. Serial n 146,96 r. I

mite and the incidint increase in the cost of the cartridge is very objectionable and it appears to be impractical to apply the Jones anchoring device i1. cartridges which are automatically made in large numbers on machines, the practice which commonly prevails at the present day. Such machines introduce dynamite into a large number of paper shells simulta neously and afterward close the open ends of the shells. The introduction of the auch .')1 of the Jones patent has to occur when the dynamite is being packed into the shel a difficult and expensive operation.

To obviate the disadvantages inhering in the methods and devices above set fortlnI have provided an im )rered primer and fuse retainer or anchor adapted to be tied to the fuse to hold it and the cap firmly anchored to the cartridge. Ir my invention the cap and end of the fuse areintroduced into an. opening extending inwardly from the end of the cartridge, whi :h is the safest position for both cap and fuse. I

In carrying out my invention I provide a retaining device, pnferahly of bell-shaped or flared form secured on the fuse and positioned so that, after opening or unfolding the end of the paper shell, and inserting the cap in the dynar lite, the said, retaining device will be lecatel Within the mouth of the opened end of he shell and the said opened end may then be secured around the retaining device by tjing a cord around the shell. The invention may be carried out by the provision of a retainerwhich is crimped or otherwise secured on to the fuse, or, the end of the cap itself may be fla ed and the cap made of sufiicient length so that said flared end will be loo xted Within the opened end of the paper she .1 when the cap is embedded in the dynamite cartridge. The opened end of the siell may then be tied around the flared one of the cap by using a cord. In either form of the invention, or in such modification as it may assume, the flared or bell-shaped retainer is secured on the fuse and, consequently, when the opened end of the shell is tied around the retainer, the primed cartridge is securely connected to the fuse and carnot become detached therefrom.

I am aware that my invention is susceptible of modification other than that set the col,- anu the embodiments hereinafter described and shown in the accompanying drawings-are to be considered is illustrative rather than restrictive of the scope of the invention.

In the drawings, Figure 1 IS a vertical section, partly in elevation,.sh\\"-ing the complete primed 'eartridge except that the opened end of the shell .10

has not been tied around "the retainer;v

' 1 theeartridge when the opened end has been closed und tied urouud'the retainer; and

Fig. 3' view like Fig. 2, partly broken away, showing amodification.

The paper shell or curtr dge l-may .be

formed in any lllill'llltl,'il spirally wound shell being shown. The complete cartridge, as conunonly suppl ed to the user contains the Id \'nu1nite 2 :ind has both; of'its ends folded. In Fig. 1 one of the folded ends is shown at 3, the otherend 4 which ivus folded as is the end 3, huring'been opened after. the insertion of the cup or detonutor which,

previous to insertion in the dynmnite 2, has

)een' crimp ed on in suitable length ofiuse (3.

Referring to Figs. 1 and 2, 1 provide on the fuse (i a retainer 7, prelerzibiv of metal, which-is crnnped on to the fuse m the sznne manner that the cap '5' crimped thereon and is. located at 21-point where it wiil lie within the opened end 4 of the shell 1 when the cap 5 has beeninserted in the dynamite 2 to a suitable de'pth. Phe retainer 7 is of flared or bell-shaped form to prevent slippage thereon of the opeiie'd end 4 after-the latter has been tied therearound by a cord such as shown at S ,in Fig. I'wish it understood, however, that I'do'not limit my self to u bell-shaped or flared retainer 7, al-

though that form is particularly adapted to =carry out the purpose of the invention;

In Fig. 3 -thecap 5 is shown as formed with a flared retainer end 7 such cap being ,crimped on. the fuse 6, asnsu'al, end of such lengththatithe flared end 7 will be disposed within the openedend 4 when the cup 5 has "been inserted to; a.;- s1 1itable depth in the dynaa detail perspective of the end of carried by means W1 1 signature;

mite '2. A' cord 8"- is, like'the cord 8, used for tying the end 4 of, the'shell'around the 'flnred end 7 of the, cap.-

Having. o ened theend4 and the retainer -7,-.or 7', is disposed within the opened end 4, the latteris then tied around the retainer hy -lusing the cord 8 orS", thus inserted-the cap 5 into t e dynamitefat the point wherev securely anchoring the cartridg to thefuse. 6.

manner set forthmay be tumped into the blast hole without dainger of accidental dis charge if ordinary precautions ul'e observed,

capipulling out.:-

and there-is little likelihood of the fuse and airing thus described my invention, what .Ifclaim as newand'desire to secure. hyvLet-- ters l.-utent'1s:-

1. A primer re'tuinerfor dynamite cartridges comprising means adapted to be the {use at a point where said lie within 'un opened end of the A'cartridge which has beenprimed in the shell when the cup or primer is in the dyuumite, therehy permitting the opened end of the shell to be. secured around Stllll'fQiLlllllOl'. '2; A primer retainer for dynamite ear" tridges' comprising a flared member udupted to be carried by the fuse at a oint where endof the shell when the cup or primer is :"in the dynamite, thereby permitting the opened end of the shell to be said fiaredxmember.

3.'Means for priming a, dynamite cartridge comprising; a cup-or primer, afuse-or the like, and-a. ollow flared retm'nerfassaid flared member will lie 'w-ithin an opened tened on the fuse and located zit-u point where said retainer will lie within an opened end -of the's hjell when "the cap :or primer is in the dynamite, thereby permitting'the opened end of the shell to'be secured around said retainer, and a cord or the like for tyin' the opened end oi the shell'uroundsoid:

. AR-R co s' obr-.v

0' secured around 

